The purpose of this study was to examine the relationship between snack food intakes and dental caries in 661 Korean elementary school children. After each meal, 59.6% of the surveyed children ate snack foods, in particular, they ate snack heavily after lunch. The snack food items causing dental caries contained high levels of sugar and were convenience foods, which the children had preference toward. In addition, the intake frequency of snack foods substituted for meals was greater than 54%. Based on the results, the eating behaviors of children are in need of correction, and nutrition education on snack foods inducing dental caries is required.